Tensiones nominales.
STANDARD VOLTAGES.
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29.020 / Electrical engineering in general
CTN 217 - Electrical energy supply systems
IEC 60038:1983 (Identical)
It is cancelled by: UNE-EN 60038:2012
Cancel: UNE 21127:1979
Modified by: UNE 21127/1M: 2000
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